Governor switch



Nov. 25, 1958 w. M. BURNSIDE I 2,862,079

GOVERNOR SWITCH Original Filed Sept. 10. 1954 3 Sheets-Sheet 1 IN V ENTOR.

li/fer 50/20 e Nov. 25, 1958 W. M. BURNSIDE GOVERNOR SWITCH 5Sheets-Sheet 2 HIIN Amp W q: 140 "w ll 1 x .i IMO .142

.961. 1/ I 'i H'H Q1291 "M C) .Tx; Form/ Nov. 25, 1958 w. M. BURNSIDEGOVERNOR SWITCH 3 Sheets-Sheet 3 Original Filed Sept. 10. 1954 UnitedStates Patent GOVERNOR SWITCH Walter M. Burnside, Waukegan, Ill.,assignor to Raymond T. Moloney, Chicago, 111.; American National Bankand Trust Company of Chicago, executor of the estate of said Raymond T.Moloney, deceased Original application September 10, 1954, Serial No.455,217, new Patent No. 2,709,593, dated May 31, 1955. Divided and thisapplication April 12, 1955, Serial No. 500,797

7 Claims. (Cl. 200-105) drive means individually operable to effect thedifferent turning rates of the shaft means in response to input signalsor control pulses applied thereto from some desired external sourcewhich supplies the governing factors.

Other objects relate to the provision of switches actuated by cams ofdesired control shape on a differential shaft means, and a differentialgear means with separately operable electromagnetic means for effectingreverse action of the shaft means at different rates in response tosimilar input or governing pulses.

Additional objects and aspects of the invention pertain to details ofthe connections, structures, and operation of the illustrativeembodiment described hereinafter in view of the annexed drawing inwhich:

Fig. 1 is a. skeletonized perspective of the essential components of thegovernor switch;

Fig. 2 is a front elevation of the governor unit;

Fig. 3 is a top plan view of the governor unit;

Fig. 4 is a fragmentary rear elevation of the cam switch means of thegovernor unit;

Fig. 5 is a fragmentary vertical section of the differential gear meanslooking in the direction of lines 5-5 of Fig. 3;

Fig. 6 is a fragmentary vertical section of the differential gear meanslooking in the direction of lines 66 of Fig. 3;

Fig. 7 is a fragmentary vertical section through the completedifferential gear means of Figs. 5 and 6 looking at right angles to thelatter views.

The governor switch is constructed as a compact unit, as will appearfrom the top plan view in Fig. 3 wherein the structure is seen toinclude a pair of frame plates 90 and 91 secured in spaced relation bymeans of spacers 92, plate 90 having an offset mounting flange 90A.Brackets 93 and 94 are bolted to plate 91 to serve as mounts for theseveral snap switches 132A-136A, which ride the corresponding cam discs132-136 fast on the governor shaft 128, the relative positions of thecams and switches being illustrated in Fig. 4.

Referring still to Fig. 3, it will be observed that the differentialgear unit generally indicated at 95 is disposed between the mountingplates, and as shown in the detail of Fig. 7, consists of bevel gears 96and 97 meshing with a pair of planetary pinions 98 carried on a stubshaft fixed on the governor shaft 128. The bevel gear 96 is driven(Figs. 5 and 8) from stub shaft 96E "ice through a train of gears 96A,96B, 96C, 96D; whereas the other bevel gear 97 and its companion gear97A is similarly driven through intermediates 9713 from drive pinion 97Con stub shaft 97D.

The gear ratios for the gears associated with the differential gears 96,97 are not the same, so that for equal displacements of the stub shafts96E and 97D the rotation of shaft 128 will be different.

As seen in Fig. 2, the stub shaft 96E is driven by the ratchet gear 129fast thereon, while the other stub shaft 97D is driven by ratchet gear130, there being separate electromagnets 137 and 140 mounted on theplate with corresponding pawl means 137A, 140A for stepping saidratchets to produce the aforesaid opposite rotative movements of thegovernor shaft, each ratchet having a corresponding holding pawl 129A,130A to prevent retrograde movement.

The operation of the governor will be understood from the skeletonizedview of Fig. 1 in which the electromagnet 137 may be energized from anydesired control circuit (not shown), such as that described in saidPatent No. 3,709,503, thereby moving the ratchet gear 129 one step foreach impulse to the coil, the resulting motion of stub shaft 96E beingtransmitted through pinions 96C,

, 96D, and the intermediate gearing 96B to gear 96A and its bevel gear96, with a resultant displacement of the planetary pinions 98, which arecarried for planetary rotation on the governor shaft 128.

Impulsing of the electromagnet from any other verse movement of shaft128 from that produced b actuation of coil 137.

The gear ratios mentioned heretofore, as well as the. mathematicaldevelopment orevolutionof the several cams 132136"and angular locatingthereof will produce the desired operations at different timesresponsive to rotation of the governor shafts, said operations beingaveraged on computed frequency tables based upon a desired or predictedfrequency of operation of the drive means or electromagnets 137 and 140,depending upon the desired performance required of the unit and whichwill form the basis for the selection of said ratios and camcharacteristics.

It is contemplated that the invention shall not be limited to anyprecise details of structure, arrangement, operation or circuit plan orconnection, excepting as may be specifically required by the appendedclaims.

I claim:

1. Governor means of the class described comprising a plurality ofgovernor switches and corresponding actuating cams driven from a commonshaft, separate electromagnetic drive units for rotating said shaftdifferent angular amounts in opposite directions responsive toimpulseoperation of said drive units, differential gear meansinterconnecting said shaft with said drive units, separate energizingcircuits for said drive units, said governor switches being adapted forconnection in circuits to be controlled, and being opened and closed bysaid cams in accordance with the relative frequency of operation of saiddrive units.

2. A governor switch comprising a plurality of governing switchesadapted to be connected in circuits to be controlled, cam meansrotatable in opposite directions to actuate said governor switches, acommon shaft for said cam means, dilferential gearing driving said shaftin opposite directions at different gear ratios, and electromagneticstepping means selectively operable to drive said difierential gearingin said opposite directions.

3. A differential switch comprising a shaft, switchopera-ting meanscarriedby said shaft, two electromagnetic ratchet devices each adaptedfor connection to a separate control circuit to be respectively andindependently actuated thereby and each including a ratio-determiningmechanism of different ratio value'from the other, and differentialdrive means rotatively interconnecting said shaft with both ratchetdevices to'be stepped inopposite directions by actuation of one or theother of said. devices; the angular displacements of the shaft impartedby the said ratchet devices inaccordance with the ratio value aforesaidbeingditferent in each case.

4. A switch mechanism comprising a rotatable shaft, cams rotatable withsaid shaft, switch means mounted adjacent said shaft for actuationseverally by said cams; separate reversely-operating ratchet steppingmechanisms and ratio-determining'means'drivingly interconnecting thesame with said shaft; separate electromagnet actuating means for eachstepping ratchet. mechanism and respectively energizable by sequentialpulses to effect stepping action of the appertaining ratchet mechanism;the magnitude of each step produced by one saidstepping mechanism beingdifferent from that of theother said mechanism in accordance with therelative ratios of said determining'means whereby the reverse steppingmovements imparted thereby to said shaft will be of different mag nitudein opposite directions and the relative rates of travel of saidswitch-operating cams will be correspondingly different in said oppositedirections.

5. In a power-actuated switch mechanism, in combination: a shaft; adifferential gear set including a pair of reversely drivable gearsconcentrically rotatable with,

displacements of said shaft at. different. relative ratios per stepresponsive to pulsing of the appertaining electromagnetic device; andswitch-actuating means carried by said shaft.

6. A governor switch comprising a switch-actuating shaft rotatable inopposite directions; a plurality of switch devices mounted adjacent saidshaft; means moved by rotation of said shaft in either direction forselectively actuating certain of said switch devices at some angularposition of travel of the shaft in either direction; a differentialdrive mechanism connected to drive said shaft reversely dependently uponapplication of reverse driving pulses to said diiferential mechanism;and means including separate electromagnetic means respectivelyactuating gear means of ditferent ratios having driving connection withsaid differential mechanism for operation responding to pulses ofsubstantially the same duration to produce rates of actuation of saidswitch means by said shaft means which are different in oppositedirections.

7. Switch mechanism of the class described comprising, a shaft,switch-operating members rotated by said shaft, switch means actuatedrespectivelyby said members; a differential gear drive connecting withsaid shaft and having two driving gears difierentially interdriven by apair of planetary idling pinions; a toothed stepping ratchetfor each ofsaid driving gears and means drivingly connecting the, same therewith,the number of teeth on said ratchetsbeing unlike; and pawl meansoperable to step each of said ratchets independently; the drivingconnections between said ratchets and the corresponding differentialdriving gears being in opposite senses, whereby stepping of one-of saidratchets produces a reverse rotation of said; shaft from the otherratchet, and at a different angular rate.

Referencesv Cited in the file of this patent UNITED STATES PATENTS732,157 Bedw-orth June 30 1903 884,441 Weser Apr. 14, 1908 1,040,940Grunow Oct. 8, 1912 2,379,415 Charbonneaux July 3, 1945

